Abstract: The present disclosure relates to a wireless battery management system, and more particularly, to a wireless battery management system, a node for wireless communication, and a method of transmitting data, which ensure stability and efficiency when obtaining battery data through wireless communication. A wireless battery management system includes a manager node obtaining battery data from a plurality of monitor nodes by using a first channel and a second channel which are communication channels based on wireless communication, a first monitor node collecting first battery data and transmitting the first battery data to the manager node through the first channel during a first dedicated slot, and a second monitor node collecting second battery data and transmitting the second battery data to the manager node through the second channel during the first dedicated slot.

Abstract: The present disclosure relates to a wireless battery management system which ensures stability when obtaining battery data through wireless communication. The battery management system includes a manager node operating a primary channel and a secondary channel based on wireless communication and obtaining battery data from a monitor node by using the primary channel or the secondary channel and a monitor node connected to a battery module to collect battery data including one or more of a current, a voltage, a temperature, and self-diagnosis data of the battery module, transmit the collected battery data to the manager node through the primary channel, and when the transmission of the battery data through the primary channel fails, transmit the battery data to the manager node through the secondary channel.

Abstract: A data storage device and a storage system including the same are disclosed. The data storage device includes a nonvolatile memory device configured to store user data and metadata including data type identification information matched with the user data, and a controller to control the nonvolatile memory device to be switched to a cold data storage device for storing cold data only when a number of program-erase (PE) cycles of the nonvolatile memory device is equal to or larger than a reference value.

Abstract: The present disclosure relates to a wireless battery management system which ensures stability when obtaining battery data through wireless communication. The battery management system includes a manager node operating a primary channel and a secondary channel based on wireless communication and obtaining battery data from a monitor node by using the primary channel or the secondary channel and a monitor node connected to a battery module to collect battery data including one or more of a current, a voltage, a temperature, and self-diagnosis data of the battery module, transmit the collected battery data to the manager node through the primary channel, and when the transmission of the battery data through the primary channel fails, transmit the battery data to the manager node through the secondary channel.

Abstract: Provided are a novel tetracarboxylic acid dianhydride and a method for preparing the same. According to an exemplary embodiment of the present invention, a novel tetracarboxylic acid dianhydride appropriate for providing a polyimide film having high transparency and thermal resistance and having excellent thermal dimensional stability due to a substrate of which the stress is not increased even with a heat treatment at a high temperature and a method for preparing the same may be provided.

Abstract: Provided are a polyimide precursor, a polyimide precursor solution, a polyimide film, a method for preparing the same, and a use thereof. According to an exemplary embodiment of the present invention, a polyimide film having excellent thermal resistance and satisfying transparency and a low coefficient of linear thermal expansion may be provided, and thus, may be usefully applied in a flexible display field requiring high dimensional stability and the like.

Abstract: Disclosed herein is a battery storage device for an electric vehicle, in which a battery casing is provided under a vehicle floor to secure an indoor space, and a battery module is cooled using indoor air, thus simplifying a cooling structure and reducing a manufacturing cost.

Abstract: Provided are a method for manufacturing a single-crystal semiconductor layer. The method of manufacturing the single crystalline semiconductor layer includes performing a unit cycle multiple times, wherein the unit cycle includes a metal precursor pressurized dosing operation in which a metal precursor is adsorbed on a surface of a single crystalline substrate by supplying the metal precursor onto the single crystalline substrate while an outlet of a chamber in which the single crystalline substrate is loaded is closed such that a reaction pressure in the chamber is increased; a metal precursor purge operation; a reactive gas supplying operation in which a reactive gas is supplied into the chamber to cause a reaction of the reactive gas with the metal precursor adsorbed on the single crystalline substrate after the metal precursor purge operation; and a reactive gas purge operation.

Abstract: A data storage device and a storage system including the same are disclosed. The data storage device includes a nonvolatile memory device configured to store user data and metadata including data type identification information matched with the user data, and a controller to control the nonvolatile memory device to be switched to a cold data storage device for storing cold data only when a number of program-erase (PE) cycles of the nonvolatile memory device is equal to or larger than a reference value.

Abstract: The present invention provides a method enabling a quantitative analysis of a polymer by MALDI mass spectrometry, and a method for manufacturing a sample for MALDI mass spectrometry for a quantitative analysis of a polymer. To that end, the methods can increase reproducibility of a MALDI spectrum by making uniform the thickness of a sample affecting the pattern in a polymer MALDI spectrum. The sample according to the present invention is applicable also to a commercial MALDI-TOF instrument, and, thus, can quantitatively analyze a polymer in a more efficient and faster manner.

Abstract: A thin film transistor according to the inventive concept includes: a substrate; an insulating layer provided on the substrate; a superlattice channel layer provided on the insulating layer; and a source electrode and a drain electrode configured to cover a pair of opposite lateral surfaces of the superlattice channel layer, wherein the superlattice channel layer includes alternately stacked semiconductor layers and organic layers. A thickness of each semiconductor layer may be greater than about 3 nm to less than about 5 nm, and a thickness of each organic layer may be about 1 ? to about 1 nm.

Abstract: A wireless battery management system, a manager node for the same, and a channel operating method, which operate a channel so as to stably support wireless communication in the wireless battery management system, are provided. The wireless battery management system includes a manager node and a monitor node. The manager node establishes a first network being a short-range wireless network by using at least one of a first channel and a second channel, and when a second network using the same communication channel and modulation method as a communication channel and a modulation method of the first network is detected, changing the first channel to a third channel and changing the second channel to a fourth channel.

Abstract: The present disclosure relates to a wireless battery management system, and more particularly, to a wireless battery management system, a node for wireless communication, and a method of transmitting data, which ensure stability and efficiency when obtaining battery data through wireless communication. A wireless battery management system includes a manager node obtaining battery data from a plurality of monitor nodes by using a first channel and a second channel which are communication channels based on wireless communication, a first monitor node collecting first battery data and transmitting the first battery data to the manager node through the first channel during a first dedicated slot, and a second monitor node collecting second battery data and transmitting the second battery data to the manager node through the second channel during the first dedicated slot.

Abstract: The present disclosure relates to a wireless battery management system which ensures stability when obtaining battery data through wireless communication. The battery management system includes a manager node operating a primary channel and a secondary channel based on wireless communication and obtaining battery data from a monitor node by using the primary channel or the secondary channel and a monitor node connected to a battery module to collect battery data including one or more of a current, a voltage, a temperature, and self-diagnosis data of the battery module, transmit the collected battery data to the manager node through the primary channel, and when the transmission of the battery data through the primary channel fails, transmit the battery data to the manager node through the secondary channel.

Abstract: Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.

Abstract: The present invention provides a method enabling a quantitative analysis of a polymer by MALDI mass spectrometry, and a method for manufacturing a sample for MALDI mass spectrometry for a quantitative analysis of a polymer. To that end, the methods can increase reproducibility of a MALDI spectrum by making uniform the thickness of a sample affecting the pattern in a polymer MALDI spectrum. The sample according to the present invention is applicable also to a commercial MALDI-TOF instrument, and, thus, can quantitatively analyze a polymer in a more efficient and faster manner.

Abstract: A heterogeneous fieldbus-based gateway system includes a master inverter and a control device. The control device is configured to transmit, to the master inverter, a data indicating that the same monitoring or control command is to be transmitted to all of the master inverter and a plurality of slave inverters. When the master inverter determines based on the data that the control device transmits the same monitoring or control command to all of the master inverter and the plurality of slave inverters, the master inverter is configured to transmit a response to the command to the control device and to transmit the command to each of the slave inverters.

Abstract: A differential for an automobile according to an exemplary embodiment of the present invention includes: a housing in which a pinion gear and a plurality of side gears are disposed and is provided with a flange portion in which a coupling hole is formed at an outer side thereof; and a bush which has an insertion portion which is inserted into the coupling hole and is provided with a thread at an inner surface thereof so as to be coupled with a coupling member. Since the coupling member is not directly coupled to the housing but is coupled to the bush which is connected to the housing, the direct contact friction between the housing and the coupling member which are made of different materials can be avoided and thus the damage of the coupling section can be prevented.

Abstract: Provided is a method of preparing poly(alkylene carbonate) using a molecular weight regulator in a process of preparing a copolymer of carbon dioxide/epoxide using a novel complex synthesized from salen-type ligand including a quaternary ammonium salt as a catalyst. According to the present invention, even though the molecular weight regulator is used, an activity of the catalyst may be stably maintained, whereby the low molecular weight of poly(alkylene carbonate) having a desirable level may be effectively provided. In addition, it is expected that since the novel complex as the catalyst of the present invention has a simple structure as compared to the existing copolymerization catalyst, due to the economical preparation cost thereof, the novel complex may be effectively applied to a large-scale commercial process.

Abstract: A differential for an automobile according to an exemplary embodiment of the present invention includes: a housing in which a pinion gear and a plurality of side gears are disposed and is provided with a flange portion in which a coupling hole is formed at an outer side thereof; and a bush which has an insertion portion which is inserted into the coupling hole and is provided with a thread at an inner surface thereof so as to be coupled with a coupling member. Since the coupling member is not directly coupled to the housing but is coupled to the bush which is connected to the housing, the direct contact friction between the housing and the coupling member which are made of different materials can be avoided and thus the damage of the coupling section can be prevented.